2027 ICD-10-CM Diagnosis Code R93.1Abnormal findings on diagnostic imaging of heart and coronary circulation

ICD-10-CM Codes›R00–R99›R90-R94›R93

ICD-10-CM R93.1
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

R93.1 is a billable ICD-10-CM diagnosis code for abnormal findings on diagnostic imaging of heart and coronary circulation. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 302 through 303. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abnormal findings without diagnosis.

Code Identity

ICD-10-CM Code
R93.1
Billable Status
Yes — Valid for Submission
Code Describes
Abnormal findings on diagnostic imaging of heart and coronary circulation
Short Description
Abnormal findings on dx imaging of heart and cor circ
Parent Code
R93
Abnormal findings on diagnostic imaging of other body structures

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR90-R94Abnormal findings on diagnostic imaging and in function studies, without diagnosis
CategoryR93Abnormal findings on diagnostic imaging of other body structures
This CodeR93.1Abnormal findings on diagnostic imaging of heart and coronary circulation

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Angiocardiography abnormal
  • Angiography of coronary artery abnormal
  • Aortic aneurysm screening abnormal
  • Coeur en sabot
  • Coronary slow flow phenomenon
  • Decreased cardiac ejection fraction
  • Decreased cardiac function
  • Echocardiography abnormal
  • Echocardiography shows left ventricular diastolic dysfunction
  • Echocardiography shows left ventricular systolic dysfunction
  • Enlarged aortic root
  • Heart valve calcification
  • Imaging of heart abnormal
  • Left ventricular blood flow - finding
  • Left ventricular echogenic stagnant blood
  • Left ventricular ejection fraction decreased
  • Left ventricular mass
  • New left ventricular wall motion abnormality compared to prior study
  • Nuclear medicine imaging abnormal
  • Radiographic shadow of heart abnormal
  • Radionuclide heart study abnormal
  • Right ventricular blood flow - finding
  • Right ventricular echogenic stagnant blood
  • Right ventricular function - finding
  • Right ventricular mass

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to R93.1: its own notes plus those printed at block R90-R94 and Chapter 18. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis applies to 64 codes
  • nonspecific abnormal findings on diagnostic imaging by computerized axial tomography [CAT scan]
  • nonspecific abnormal findings on diagnostic imaging by magnetic resonance imaging [MRI][NMR]
  • nonspecific abnormal findings on diagnostic imaging by positron emission tomography [PET scan]
  • nonspecific abnormal findings on diagnostic imaging by thermography
  • nonspecific abnormal findings on diagnostic imaging by ultrasound [echogram]
  • nonspecific abnormal findings on diagnostic imaging by X-ray examination

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Abnormal echocardiogram NOS
  • Abnormal heart shadow

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis applies to 64 codes
  • abnormal findings on antenatal screening of mother (O28.-)
  • diagnostic abnormal findings classified elsewhere - see Alphabetical Index

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 18 (R00-R99) Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified applies to 774 codes
  • abnormal findings on antenatal screening of mother (O28.-)
  • certain conditions originating in the perinatal period (P04-P96)
  • signs and symptoms classified in the body system chapters
  • signs and symptoms of breast (N63, N64.5)

Notes

General instructions on how these codes are used.

From Chapter 18 (R00-R99) Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified applies to 774 codes
  • This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
  • Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
  • The conditions and signs or symptoms included in categories R00-R94 consist of:
  • (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
  • (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
  • (c) provisional diagnosis in a patient who failed to return for further investigation or care;
  • (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
  • (e) cases in which a more precise diagnosis was not available for any other reason;
  • (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name R93.1, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming R93.1: they are not reported together with it, unless the two conditions are unrelated.

  • R22 Localized swelling, mass and lump of skin and subcutaneous tissue
    abnormal findings on diagnostic imaging (R90-R93) names R90-R93, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SYM017
Abnormal findings without diagnosis
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Heart Health Tests

Heart diseases are the number one killer in the United States. They are also a major cause of disability. If you do have heart disease, it is important to find it early, when it is easier to treat. Blood tests and heart health tests can help find heart diseases or identify problems that can lead to heart diseases.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert R93.1 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
793.2 Nonsp abn intrathor NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About R93.1Overview

Is R93.1 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abnormal findings on diagnostic imaging of heart and coronary circulation on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does R93.1 group to?

When abnormal findings on diagnostic imaging of heart and coronary circulation is the principal diagnosis on an inpatient stay, it groups to MS-DRG 302, 303, with relative weights from 0.6610 to 1.1993 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R93.1 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the abnormal findings on diagnostic imaging of heart and coronary circulation is established, that condition takes the principal position instead.

Can R93.1 be reported with a code from O28?

Not as a rule. The Excludes1 note at block R90-R94, which applies to R93.1, lists "abnormal findings on antenatal screening of mother (O28.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of R93.1?

Under the General Equivalence Mappings, abnormal findings on diagnostic imaging of heart and coronary circulation converts to ICD-9-CM 793.2 (nonsp abn intrathor NEC). The mapping is approximate, so confirm the match fits the documentation.